A primary user emulation attack with motional users in cognitive radio networks

In cognitive radio networks, malicious user (MU) sends a signal which is similar to the primary user´s (PU) signal, leading to the secondary user (SU) can´t access to the spectrum of communication networks, which is named primary user emulation attack (PUEA). In this paper, we first propose a cognitive radio networks model with motional users, while MU and SUs are made up of an approximation centralized cooperative sensing networks. The motional users include two SUs and a MU. When MU and SUs move in the certain range, MU could attack SUs heavily by adjusting its transmission power real-time. According to the proposed model, a PUEA scheme with motional users will be verified based on different HDF (Hard Decision Fusion). The simulation results show that the proposed PUEA with motional users is intelligent and stable.